CN113497997A - Sound generating apparatus and method for vehicle - Google Patents

Sound generating apparatus and method for vehicle Download PDF

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Publication number
CN113497997A
CN113497997A CN202010863479.7A CN202010863479A CN113497997A CN 113497997 A CN113497997 A CN 113497997A CN 202010863479 A CN202010863479 A CN 202010863479A CN 113497997 A CN113497997 A CN 113497997A
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China
Prior art keywords
motor
sound
target
current
output
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Pending
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CN202010863479.7A
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Chinese (zh)
Inventor
张琼镇
曺永勋
李到烘
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Hyundai Motor Co
University Industry Cooperation Corporation of Konkuk University
Kia Corp
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Hyundai Motor Co
Kia Motors Corp
University Industry Cooperation Corporation of Konkuk University
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Application filed by Hyundai Motor Co, Kia Motors Corp, University Industry Cooperation Corporation of Konkuk University filed Critical Hyundai Motor Co
Publication of CN113497997A publication Critical patent/CN113497997A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/50—Reduction of harmonics
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q5/00—Arrangement or adaptation of acoustic signal devices
    • B60Q5/005—Arrangement or adaptation of acoustic signal devices automatically actuated
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K15/00—Acoustics not otherwise provided for
    • G10K15/02—Synthesis of acoustic waves
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
    • H02P21/0003—Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
    • H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q5/00—Arrangement or adaptation of acoustic signal devices
    • B60Q5/005—Arrangement or adaptation of acoustic signal devices automatically actuated
    • B60Q5/008—Arrangement or adaptation of acoustic signal devices automatically actuated for signaling silent vehicles, e.g. for warning that a hybrid or electric vehicle is approaching

Abstract

The present disclosure relates to a sound generation apparatus and method for a vehicle, the sound generation apparatus including: a motor controller generating a motor torque corresponding to the target sound; and an output device that outputs a target sound based on vibration generated by the motor torque to generate a sound of the vehicle without an external amplifier or a separate actuator, thereby preventing an increase in cost and weight.

Description

Sound generating apparatus and method for vehicle
Cross Reference to Related Applications
This application claims the benefit of priority from korean patent application No. 10-2020-0041121 filed on korean intellectual property office at 3.4.2020, which is hereby incorporated by reference in its entirety.
Technical Field
The present disclosure relates to a sound generation apparatus and method for a vehicle.
Background
Recently, a technology for generating a driving sound desired by a user using a speaker or an electric actuator in a vehicle has been developed. This technique requires an external amplifier for sound control or a separate actuator, and therefore, has a problem of increasing cost and weight.
The information included in this background section is only for enhancement of understanding of the general background of the disclosure and may not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.
Disclosure of Invention
The present disclosure has been made to solve the above-mentioned problems occurring in the prior art, while fully maintaining the advantages achieved by the prior art.
An aspect of the present disclosure provides a vehicle sound generation apparatus and method capable of generating a vehicle sound without requiring an external amplifier or a separate actuator. And an aspect of the present disclosure provides a vehicle sound generation apparatus and method capable of generating a vehicle sound using a motor (DC motor) mounted in a vehicle.
The technical problems to be solved by the inventive concept are not limited to the foregoing problems, and any other technical problems not mentioned herein will be clearly understood by those skilled in the art to which the present disclosure pertains from the following description.
According to an aspect of the present disclosure, a sound generating apparatus for a vehicle may include: a motor controller generating a motor torque corresponding to the target sound; and an output device that outputs a target sound based on the vibration generated by the motor torque.
The motor controller may include: target signal setting means for outputting a target current for generating a target sound; a motor control circuit device that calculates a motor drive control voltage based on the target current; a motor drive device that adjusts a motor drive current based on a motor drive control voltage; and a motor that generates a motor torque when a motor drive current is applied thereto.
The target signal setting means may include: an AD converter that converts a setting sound corresponding to a target sound into a digital signal; a target sound signal generator for filtering the digital signal; a motor-specific function operation signal generator that operates a motor-specific function; and a signal synthesizer that outputs a target current by synthesizing signals output from the target sound signal generator and the motor specific function operation signal generator.
The motor control circuit arrangement may comprise: a Proportional Integral Derivative (PID) controller that receives power of the motor control power source and performs feedback control on a target current; a noise processor removing noise of the target current on which the feedback control has been performed; and a Pulse Width Modulation (PWM) control circuit device that calculates a motor drive control voltage based on the target current processed by the PID controller and the noise processor.
The noise processor may compare a value of a target current on which feedback control is performed from the PID controller with a preset reference value in magnitude, determine whether overshoot of the value of the target current on which feedback control is performed beyond the reference value has occurred, remove the overshoot when the overshoot occurs, detect a signal waveform of the target current on which feedback control is performed when the overshoot does not occur, determine whether distortion of the signal waveform occurs by comparing the signal waveform of the target current on which feedback control is performed with a target waveform corresponding to a target sound, and remove the distortion using a digital filter when the signal waveform of the target current on which feedback control is performed is distorted.
The motor driving device may include: a gate driver circuit device including a plurality of gate drivers that control states of the motor drive switches in accordance with the motor drive control voltage; and a motor drive circuit device including a motor drive switch that adjusts a motor drive current output to the motor, and a current sensor circuit device.
When an electric field is generated in the motor by applying a motor driving current, the motor may rotate a rotor provided in the motor to generate a motor torque, and include a driving shaft of the motor vibrating due to the motor torque, and a stator of the motor.
The output means may include: a motor mounting portion that transmits vibration generated by motor torque; and a vehicle body panel that generates a target sound due to vibration of the motor mounting portion.
The motor mounting part may include: a motor mounting bracket vibrating due to vibration of a stator of the motor; a driving gear provided at one side of a driving shaft of the motor to vibrate due to vibration of the driving shaft of the motor; a reduction gear receiving vibration by rotation while being engaged with the driving gear; a linear movement gear driven to receive vibration while being engaged with the reduction gear; and a gear mounting portion provided with a linear motion gear.
The vehicle body panel may include: a motor mounting body panel outputting a target sound by vibration transmitted to the motor mounting bracket; and a gear mounting body panel outputting a target sound by vibration transmitted to the gear mounting portion.
When a plurality of output devices are provided, a plurality of motor controllers as many as the number of the plurality of output devices may be arranged so as to generate a plurality of target sounds.
When a plurality of output devices are provided, the setting sound may be input to a plurality of target signal setting devices.
When there are a plurality of output sounds, when a setting sound is input to one of the target signal setting devices, the plurality of target signal setting devices may communicate with each other to share the setting sound.
When there are a plurality of output voices, when a setting voice is input to one of the target signal setting devices, the one target signal setting device to which the setting voice is input communicates with a target signal setting device to which the setting voice is not input, to share the setting voice.
According to another exemplary embodiment of the present disclosure, a sound generation method for a vehicle may include: generating a motor torque corresponding to the target sound; and outputs the target sound based on the vibration generated by the motor torque.
Generating the motor torque corresponding to the target sound may include: the method includes outputting a target current for generating a target sound, calculating a motor drive control voltage based on the target current, adjusting the motor drive current based on the motor drive control voltage, and generating a motor torque when applying the motor drive current to the motor.
Outputting the target sound may include transmitting vibration generated by the motor torque to the vehicle body panel to generate the target sound.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings:
fig. 1 is a diagram showing a configuration and a signal flow of a sound generating apparatus for a vehicle according to an exemplary embodiment of the present disclosure;
fig. 2 is a diagram illustrating a configuration and a signal flow of a target signal setting apparatus according to an exemplary embodiment of the present disclosure;
fig. 3 is a diagram illustrating a configuration and signal flow of a motor control circuit according to an exemplary embodiment of the present disclosure;
fig. 4 is a diagram illustrating a configuration and a signal flow of a motor driving apparatus according to an exemplary embodiment of the present disclosure;
FIG. 5 is a diagram illustrating a current control model and signal flow for an electric motor according to an exemplary embodiment of the present disclosure;
fig. 6 is a plan view illustrating a motor according to an exemplary embodiment of the present disclosure;
fig. 7 is a diagram showing the configuration of a motor mounting portion and a vehicle body panel according to an exemplary embodiment of the present disclosure;
fig. 8 is a flowchart illustrating a noise removing method according to an exemplary embodiment of the present disclosure;
fig. 9 is a diagram illustrating a motor driving circuit and an equivalent circuit of a motor according to an exemplary embodiment of the present disclosure;
fig. 10 is a diagram illustrating a configuration of a gate driving circuit designed according to an exemplary embodiment of the present disclosure;
fig. 11A and 11B are diagrams illustrating the arrangement of a motor drive circuit device according to an exemplary embodiment of the present disclosure;
FIG. 12 is a graph illustrating measurements of a target sound generated according to an exemplary embodiment of the present disclosure;
fig. 13 is a diagram illustrating a configuration for generating a stereo sound according to an exemplary embodiment of the present disclosure;
fig. 14 is a diagram illustrating a configuration for generating a stereo sound according to another exemplary embodiment of the present disclosure; and
fig. 15 is a diagram illustrating a configuration for generating a stereo sound according to still another exemplary embodiment of the present disclosure.
Detailed Description
Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the exemplary drawings. In adding reference numerals to components of respective drawings, it should be noted that the same reference numerals are assigned to the same components as much as possible even if the same reference numerals are shown in different drawings. Furthermore, in describing embodiments of the present disclosure, detailed descriptions of well-known features or functions are excluded so as to not unnecessarily obscure the subject matter of the present disclosure.
In describing components according to embodiments of the present disclosure, terms such as first, second, "a," "B," "a," "B," may be used. These terms are only intended to distinguish one component from another component, and do not limit the nature, sequence, or order of the constituent components. Unless otherwise defined, all terms including technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. These terms, as defined in commonly used dictionaries, should be interpreted as having a meaning that is equivalent to the contextual meaning in the art and should not be interpreted as having an idealized or overly formal meaning unless expressly so defined herein.
Fig. 1 is a diagram illustrating a configuration and a signal flow of a sound generating apparatus for a vehicle according to an exemplary embodiment of the present disclosure.
As shown in fig. 1, a sound generating apparatus 100 for a vehicle according to an exemplary embodiment of the present disclosure may include a motor controller 10 and an output device 20. According to an exemplary embodiment of the present disclosure, the sound generation apparatus 100 for a vehicle may generate a vehicle sound by a DC motor.
The motor controller 10 may generate a motor torque (torque) corresponding to the target sound. To this end, the motor controller 10 may include: target signal setting means 110 for outputting a target current i for generating a target soundaA first step of; motor control circuit device 120 based on target current iaCalculating motor drive control voltage V0(ii) a Motor drive device 130 for controlling voltage V based on motor drive0Adjusting motor drive current id(ii) a And a motor 140 to which a motor drive current i is applieddTime-of-flight generation of motor torque Te. Further, the output device 20 may output the target sound based on the vibration generated by the motor torque, and for this, may include a motor mounting part 150 to be driven by the motor torque TeGenerated vibration VmTransmitted to a vehicle body panel (vehicle body panel)160 which is mounted by the vibration V of the motor mounting portionmA target sound is generated. First, the configuration of the motor controller 10 is explained in more detail with reference to fig. 2 to 5.
Fig. 2 is a diagram illustrating a configuration and a signal flow of a target signal setting apparatus according to an exemplary embodiment of the present disclosure.
As shown in fig. 2, the target signal setting means 110 may include: an AD converter 101 that converts a setting sound corresponding to a target sound into a digital signal; a target sound signal generator 102 that filters the digital signal, for example, by a low-pass filter or a high-pass filter; motor specific function operation signal generator 104 for starting motor specificOperation of a function; and a signal synthesizer 103 synthesizing signals output from the target sound signal generator 102 and the motor specific function operation signal generator 104 to output a target current ia*. Here, the setting sound corresponding to the target sound may refer to an output sound desired by the user, and may include, for example, music, an engine sound of the vehicle, a vehicle alarm sound for direction indication, and the like. Further, the motor-specific function may include operating the vehicle device by a DC motor provided in the vehicle. For example, the motor-specific function may include an operation of opening and closing a window, an operation of a wiper of a windshield, a forward and backward movement of a sunroof or a power seat, and the like. The target signal setting means 110 of the present disclosure may output the target sound using the motor torque generated by the motor. Therefore, the signal for generating sound uses a frequency of 30Hz or more, and the signal for operating the motor-specific function uses a signal of 10Hz or a DC component, so that the signal for generating sound and the signal for operating the motor-specific function do not interfere with each other.
Fig. 3 is a diagram illustrating a configuration and a signal flow of a motor control circuit according to an exemplary embodiment of the present disclosure.
As shown in fig. 3, the motor control circuit arrangement 120 may include: a Proportional Integral Derivative (PID) controller 122 for receiving the power of the motor control circuit power supply 121 and controlling the target current iaPerforming feedback control; a noise processor 123 removing noise of the target current on which the feedback control has been performed; and a Pulse Width Modulation (PWM) control circuit device 124 that calculates a motor drive control voltage V based on the target current processed by the PID controller 122 and the noise processor 1230。
The PID controller 122 may use the feedback current i received from the motor 140aAnd the angular velocity ω of the motor 140mFeedback control is performed. When the angular velocity of the motor 140 is not measured, the angular velocity may be calculated by a motor angular velocity estimation formula that has been modeled in advance, and feedback control may be performed using the calculated angular velocity.
The noise processor 123 may receive a signal from the PID controller 122 and recognize the magnitude of the voltage, compare the magnitude with a preset reference value, and determine whether an overshoot, which is that the magnitude of the voltage of the signal received from the PID controller 122 exceeds the preset reference value, has occurred. When the overshoot has occurred, the noise processor 123 may remove the overshoot, and when the overshoot has not occurred, the noise processor 123 may detect the signal waveform. The noise processor 123 may determine whether waveform distortion occurs by comparing the signal waveform with a target waveform corresponding to the target sound, and when the signal waveform is distorted, remove the distortion using a digital filter. The operation of the noise processor 123 will be described in detail with reference to fig. 8.
The PWM control circuit arrangement 124 may calculate the duty cycle of the noise-removed target current.
Fig. 4 is a diagram illustrating a configuration and a signal flow of a motor driving apparatus according to an exemplary embodiment of the present disclosure.
As shown in fig. 4, the motor driving device 130 may include: a gate driver circuit device 131 including a plurality of gate drivers 32, 34, and 36 that control the states of the motor drive switches in accordance with the motor drive control voltage calculated by the motor control circuit device 120; and a motor drive circuit arrangement 132 including motor drive switches 37, 38 and 39 that regulate motor drive current output to the motor 140, and a current sensor circuit arrangement 40.
The gate drivers 32, 34 and 36 may be respectively based on the signal V input to the gate drivers0Controlling the state of motor drive switches 37, 38 and 39. According to an exemplary embodiment, the gate drivers 32, 34, and 36 may be connected to the motor driving switches 37, 38, and 39, respectively, and control the on/off states of the motor driving switches 37, 38, and 39. The current sensor circuit device 40 may detect the amount of current of the motor drive current id output from the motor drive switches 37, 38, and 39 to the motor 140, and feed it back to the motor control circuit device 120.
Motor drive current i output from motor drive circuit device 132dCan be used for drivingA motor 140. According to an exemplary embodiment, a control model for the motor 140 may be as shown in fig. 5.
Fig. 5 is a diagram illustrating a current control model and signal flow of a motor according to an exemplary embodiment of the present disclosure.
As shown in fig. 5, the current control model of the motor may include a first transfer function 41, which refers to a voltage V when output from the motor driving device 130aBased on inductance L when applied to the motora(see FIG. 9) and resistance Ra(see FIG. 9) to determine the motor drive current idEquation (c) of (c). In addition, when the motor drive current i is determined by the first transfer function 41dAt this time, a magnetic flux is formed inside the motor due to the motor drive current, and motor torque is generated from the magnetic flux. The current control model may include a second transfer function 42 representing a motor torque constant, since motor torque and motor drive current idProportional to the motor torque constant. Further, when the motor torque is applied to the mechanical device (the mechanical device may include a propeller provided on a motor shaft), the rotational speed of the object may be determined by the moment of inertia "J" and the friction coefficient "B" of the mechanical device, and the current model may include a third transfer function 43 representing an equation for determining the rotational speed of the object.
Fig. 6 is a plan view illustrating a motor according to an exemplary embodiment of the present disclosure.
As shown in fig. 6, when current is supplied to the coil winding 147 of the motor 140 through the brush 143, an electric field may be generated in the motor 140, and a magnetic flux may be generated in the permanent magnet 141 by the electric field, thereby rotating the rotor 146. Motor torque may be generated due to rotation of rotor 146. The motor torque may be transmitted to the driving shaft 145, and the motor torque may be transmitted to the ball bearing 144 surrounding the driving shaft 145 to vibrate the stator 142, thereby outputting the target sound by the vibration of the stator 142. A more detailed description will be given regarding the target sound with reference to fig. 7.
Fig. 7 is a diagram illustrating a configuration of a motor mounting portion and a vehicle body panel according to an exemplary embodiment of the present disclosure.
As shown in fig. 7, the motor mounting part 150 may include a motor mounting bracket 151, a driving gear 152, a reduction gear 153, a linear motion gear 154, and a gear mounting part 155. The body panel 160 may include a motor mounting body panel 162 and a gear mounting body panel 164.
The motor mounting bracket 151 may be vibrated by the stator 142, the stator 142 being vibrated by the ball bearing 144 of fig. 6, and the motor mounting body panel 162 may be vibrated to output the target sound when the motor mounting bracket 151 is vibrated. Here, the target sound may refer to a structure transfer sound generated due to a structure.
Further, the driving gear 152 may receive the motor torque transmitted to the driving shaft 145, and the motor torque transmitted to the driving gear 152 may be transmitted to the reduction gear 153. In the case of opening/closing the window or sunroof, the motor torque transmitted to the reduction gear 153 may be transmitted to the linear motion gear 154 to vibrate the gear mounting portion 155, and the vibration of the gear mounting portion 155 may vibrate the gear mounting body panel 164 to output the target sound.
Here, it may be necessary to increase the radiation efficiency of the motor mount body panel 162 or the gear mount body panel 164 to output a target sound having a sufficient sound volume in a desired frequency band, and for this reason, the area of the panel may be increased, and the thickness of the panel may be thin and a panel of a material having a high elastic modulus may be provided.
Fig. 8 is a flowchart illustrating a noise removing method according to an exemplary embodiment of the present disclosure.
As shown in fig. 8, the noise processor 123 may receive a signal from the PID controller 122 (S110), and identify the magnitude of the voltage of the received signal (S120). The noise processor 123 may compare the magnitude of the voltage of the received signal with a preset reference value and determine whether an overshoot, in which the magnitude of the voltage of the signal received from the PID controller 122 exceeds the preset reference value, has occurred (S130). When the overshoot occurs in S130 (yes), the noise processor 123 may remove the overshoot (S140), and when the overshoot does not occur (no), the signal is stored (S150), and the waveform of the signal is detected (S160). The noise processor 123 may determine whether distortion of the waveform occurs by comparing the signal waveform with a target waveform corresponding to the target sound (S170). When it is determined that the signal waveform is distorted (yes) in S170, the noise processor 123 may remove the distortion using a digital filter (S180). When it is determined in S170 that the signal waveform is not distorted (no), the noise processor 123 may output a signal to the PWM control circuit device 124 (S190).
Fig. 9 is a diagram illustrating an equivalent circuit of a motor and a motor driving circuit according to an exemplary embodiment of the present disclosure.
The motor 140 according to an exemplary embodiment of the present disclosure may be connected to the motor driving circuit device 132 and may be illustrated as an equivalent circuit as illustrated in fig. 9. As shown in FIG. 9, the equivalent circuit of the motor 140 may include an inductance LaResistance RaAnd a motor M, and the operation of the motor can be controlled by an armature voltage VaInduced electromotive force e generated in the winding when the motor is drivenaMotor torque T of torque generated when the motor is driveneAnd equation of motion T of the motoreWhich can be expressed by equations 1 to 4, respectively.
[ equation 1]
Figure BDA0002648955440000101
Va: armature circuit voltage (voltage applied to winding)
Ra: resistance of winding
La: inductance of winding
ea: induced electromotive force generated in the winding
Vb: component of brush voltage drop
id: current flowing through the winding
[ equation 2]
ea＝ke·φf·ωm
Ke: constant quantity
Figure BDA0002648955440000102
Magnetic flux
ωm: angular velocity
[ equation 3]
Te＝kT·φf·id
Kt: constant quantity
Figure BDA0002648955440000111
Magnetic flux
id: current flowing through the winding
[ equation 4]
Figure BDA0002648955440000112
J: moment of inertia
ωm: angular velocity
B: coefficient of friction
TL: load torque resisting rotation of motor
Fig. 10 is a diagram of a configuration of a gate driver circuit designed according to an example embodiment of this disclosure.
As shown in fig. 10, there may be a plurality of gate driver circuit devices 131, and each gate driver (302, 304, 306, 308) included in the gate driver circuit devices 131 may receive the motor drive control voltage V output from the PWM control circuit device 1240As a PWM input signal.
Fig. 11A and 11B are diagrams illustrating the arrangement of a motor drive circuit device according to an exemplary embodiment of the present disclosure.
As shown in fig. 11A, a plurality of motor drive switches 132a included in the motor drive circuit arrangement 132 may be arranged as a half-bridge circuit. As shown in fig. 11B, a plurality of motor drive switches 132a may be arranged as an H-bridge circuit.
Fig. 12 is a graph illustrating a measurement result of a target sound generated according to an exemplary embodiment of the present disclosure.
Fig. 12 is a result of measuring a target sound output when vibration is generated by setting a variable frequency sinusoidal (Sin) wave of a current of 3A as the target sound and applying it as the corresponding set sound according to the above-described embodiment of the present disclosure. The upper graph of fig. 12 shows the output volume of the target sound over time, and the lower graph of fig. 12 shows the change in the frequency spectrum over time, and it can be seen that the set target sound is output.
According to an exemplary embodiment of the present disclosure, when a plurality of output devices 20 are provided, the motor controller 10 may generate a plurality of target sounds by being arranged corresponding to the number of the plurality of output devices 20. According to an exemplary embodiment, as shown in fig. 13 to 15, a setting sound may be input to the target signal setting means 110 to generate a plurality of target sounds.
Fig. 13 to 15 are diagrams illustrating a configuration for generating a stereo sound according to an exemplary embodiment of the present disclosure.
As shown in fig. 13, the motor controllers 10 may be arranged as many as the number of the output devices 20, and the setting sound may be input to the target signal setting device 110 included in each motor controller 10.
As shown in fig. 14, the motor controllers 10 may be arranged in the same number as the output devices 20, and when the setting sound is input to the target signal setting device 110 of one of the plurality of motor controllers 10, the plurality of target signal setting devices may communicate with each other to share the setting sound.
Fig. 15 is a diagram illustrating a configuration for generating a stereo sound according to another exemplary embodiment of the present disclosure.
As shown in fig. 15, the motor controllers 10 may be arranged so that, as with the number of the output devices 20, when a setting sound is input to the target signal setting device of one of the plurality of motor controllers 10, the target signal setting device to which the setting sound has been input may communicate with the target signal setting device to which the setting sound has not been received to share the setting sound.
In the foregoing, although the present disclosure has been described with reference to the exemplary embodiments and the accompanying drawings, the present disclosure is not limited thereto, but various modifications and changes may be made by those skilled in the art to which the present disclosure pertains without departing from the spirit and scope of the present disclosure claimed in the appended claims.
Accordingly, the exemplary embodiments of the present disclosure are provided to explain the spirit and scope of the present disclosure and not to limit them, so that the spirit and scope of the present disclosure is not limited by the embodiments. The scope of the present disclosure should be construed in accordance with the appended claims, and all technical concepts within the scope equivalent to the claims should be included in the scope of the present disclosure.
According to the vehicle sound generation apparatus and method of the exemplary embodiment of the present disclosure, it is possible to prevent an increase in cost and weight by generating the vehicle sound without an external amplifier or a separate actuator.

Claims (17)

1. A sound generation apparatus for a vehicle, the sound generation apparatus comprising:
a motor controller configured to generate a motor torque corresponding to the target sound; and
an output device configured to output the target sound based on the vibration generated by the motor torque.
2. The sound generating apparatus according to claim 1, wherein the motor controller comprises:
a target signal setting device configured to output a target current for generating the target sound;
a motor control circuit device that calculates a motor drive control voltage based on the target current;
a motor drive device that adjusts a motor drive current based on the motor drive control voltage; and
a motor configured to generate the motor torque when the motor drive current is applied to the motor.
3. The sound generating apparatus according to claim 2, wherein the target signal setting means includes:
an analog-to-digital converter configured to convert a setting sound corresponding to the target sound into a digital signal;
a target sound signal generator configured to filter the digital signal;
a motor-specific function operation signal generator configured to operate a motor-specific function;
a signal synthesizer configured to output the target current by synthesizing signals output from the target sound signal generator and the motor specific function operation signal generator.
4. The sound generating apparatus according to claim 2, wherein the motor control circuit device includes:
a proportional integral derivative controller configured to receive electric power of a motor control power source and perform feedback control on the target current;
a noise processor configured to remove noise of the target current on which the feedback control has been performed; and
pulse width modulation control circuitry configured to calculate the motor drive control voltage based on the target current processed by the proportional-integral-derivative controller and the noise processor.
5. The sound generation apparatus of claim 4, wherein the noise processor:
comparing the value of the target current at which the proportional integral derivative controller has performed the feedback control with a preset reference value in magnitude,
determining whether an overshoot of the value of the target current for which the feedback control has been performed beyond the reference value occurs,
when the overshoot occurs, the overshoot is removed,
detecting a signal waveform of the target current on which the feedback control has been performed when the overshoot does not occur,
determining whether or not distortion of the signal waveform occurs by comparing the signal waveform of the target current on which the feedback control has been performed with a target waveform corresponding to the target sound, and
when the signal waveform of the target current, for which the feedback control has been performed, is distorted, the distortion is removed using a digital filter.
6. The sound generating apparatus according to claim 2, wherein the motor driving device comprises:
a gate driver circuit device including a plurality of gate drivers that control states of motor drive switches according to the motor drive control voltages; and
and a motor drive circuit device including the motor drive switch and a current sensor circuit device, the motor drive switch adjusting the motor drive current output to the motor.
7. The sound generating apparatus according to claim 2, wherein when an electric field is generated in the motor by applying the motor drive current, a rotor of the motor rotates to generate the motor torque, and the motor includes a drive shaft of the motor that vibrates due to the motor torque and a stator of the motor.
8. The sound generation apparatus according to claim 1, wherein the output means includes:
a motor mounting portion configured to transmit the vibration generated by the motor torque; and
a vehicle body panel configured to generate the target sound due to the vibration of the motor mounting portion.
9. The sound generating apparatus according to claim 8, wherein the motor mounting portion comprises:
a motor mounting bracket configured to vibrate due to vibration of a stator of the motor;
a driving gear disposed at one side of a driving shaft of the motor to vibrate due to vibration of the driving shaft of the motor;
a reduction gear configured to receive the vibration by rotating while being engaged with the drive gear;
a linear movement gear configured to be driven to receive the vibration while being engaged with the reduction gear; and
a gear mounting portion having the linear motion gear.
10. The sound generation apparatus according to claim 8, wherein the vehicle body panel includes:
a motor mounting body panel configured to output the target sound by vibration transmitted to a motor mounting bracket; and
a gear mounting body panel configured to output the target sound by vibration transmitted to the gear mounting part.
11. The sound generation apparatus according to claim 1, wherein, when the output device includes a plurality of output devices,
the motor controller includes a plurality of motor controllers corresponding to the number of the plurality of output devices, thereby generating a plurality of target sounds.
12. The sound generating apparatus according to claim 11, wherein the setting sound is input to a plurality of target signal setting means.
13. The sound generating apparatus according to claim 12, wherein when there are a plurality of output sounds, the plurality of target signal setting means communicate with each other to share a setting sound when the setting sound is input to one of the plurality of target signal setting means.
14. The sound generating apparatus according to claim 12, wherein when there are a plurality of output sounds, when a setting sound is input to one of a plurality of target signal setting devices, the one target signal setting device to which the setting sound is input communicates with a target signal setting device to which the setting sound is not input to share the setting sound.
15. A sound generation method for a vehicle, the method comprising:
generating a motor torque corresponding to the target sound;
outputting the target sound based on the vibration generated by the motor torque.
16. The method of claim 15, wherein generating the motor torque comprises:
outputting a target current for generating the target sound;
calculating a motor drive control voltage based on the target current;
adjusting a motor drive current based on the motor drive control voltage; and
the motor torque is generated when the motor drive current is applied to a motor.
17. The method of claim 15, wherein outputting the target sound comprises: transmitting vibration generated by the motor torque to a vehicle body panel to generate the target sound.
CN202010863479.7A 2020-04-03 2020-08-25 Sound generating apparatus and method for vehicle Pending CN113497997A (en)

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